大家有没有碰到DS4300 存储诊断提示该错误呢？
环境： ds4300 接两台交换机 两个arry ,
登陆sm查看，发现所有lun链路都切到A控上了，通过手工可以切到B控上。
从日志查看，有一台交换机掉过电，也就是说发生切换了。起初配置LUN 的时候，默认都配置为B控（是不是和这个有关系）
那现在能否更改preferred path， 让链路更加均衡。存储也不在报错，现在手动更改路径后，recheck后，不管用？
报错依旧，大家看看哪里问题？
Possible causes include:
The controller failed a manually initiated diagnostic test and was placed Offline.
The controller was manually placed Offline using the Advanced >> Recovery >> Place Controller >> Offline menu option.
There are disconnected or faulty cables.
A Hub or Fabric switch is not functioning properly.
A host adapter has failed.
The storage subsystem contains a defective RAID controller
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